libvirt/tools/virt-host-validate-ch.c

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/*
* virt-host-validate-ch.c: Sanity check a CH hypervisor host
*
* Copyright Microsoft Corp. 2020-2021
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "virarch.h"
#include "virbitmap.h"
#include "virt-host-validate-ch.h"
#include "virt-host-validate-common.h"
int virHostValidateCh(void)
{
int ret = 0;
virBitmap *flags;
bool hasHwVirt = false;
bool hasVirtFlag = false;
virArch arch = virArchFromHost();
const char *kvmhint =
_("Check that CPU and firmware supports virtualization "
"and kvm module is loaded");
if (!(flags = virHostValidateGetCPUFlags()))
return -1;
/* Cloud-Hypervisor only supports x86_64 and aarch64 */
switch ((int)arch) {
case VIR_ARCH_X86_64:
hasVirtFlag = true;
kvmhint = _("Check that the 'kvm-intel' or 'kvm-amd' modules are "
"loaded & the BIOS has enabled virtualization");
if (virBitmapIsBitSet(flags, VIR_HOST_VALIDATE_CPU_FLAG_SVM) ||
virBitmapIsBitSet(flags, VIR_HOST_VALIDATE_CPU_FLAG_VMX))
hasHwVirt = true;
break;
case VIR_ARCH_AARCH64:
hasVirtFlag = true;
hasHwVirt = true;
break;
default:
hasHwVirt = false;
break;
}
if (hasVirtFlag) {
virHostMsgCheck("CH", "%s", _("for hardware virtualization"));
if (hasHwVirt) {
virHostMsgPass();
} else {
virHostMsgFail(VIR_HOST_VALIDATE_FAIL,
_("Only emulated CPUs are available, performance will be "
"significantly limited"));
ret = -1;
}
}
if (hasHwVirt || !hasVirtFlag) {
if (virHostValidateDeviceExists("CH", "/dev/kvm", VIR_HOST_VALIDATE_FAIL,
kvmhint) < 0)
ret = -1;
else if (virHostValidateDeviceAccessible("CH", "/dev/kvm", VIR_HOST_VALIDATE_FAIL,
_("Check /dev/kvm is world writable or you are in "
"a group that is allowed to access it")) < 0)
ret = -1;
}
return ret;
}